Original Publication Date: 1980-Dec-31
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
In an electrophotographic printing machine, it is frequently necessary to furnish additional toner particles to the development material. To this end, a housing containing a supply of toner particles is generally positioned within the printing machine closely adjacent to the development system. As shown in the drawing, housing 10 includes a pair of deformable rollers 12. Rollers 12 are positioned in apertures in the lowermost portion of housing 10 and engage the side regions thereof. As rollers 12 rotate in the direction of arrows 14, they are deformed to cause toner particles to be dispensed therefrom. To this end, rollers 12 are preferably made from an open-celled urethane material. A double roll toner particle dispenser requires significantly less vertical height than a single roller dispenser in order to produce the same dispensing rate without bridging or caking occurring therein.